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8fffdba301
linux/drivers
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Mario Kleiner 8fffdba301 drm/nouveau/kms: Increase max retries in scanout position queries. 
[ Upstream commit 60b95d7095 ]

So far we only allowed for 1 retry and just failed the query
- and thereby high precision vblank timestamping - if we did
not get a reasonable result, as such a failure wasn't considered
all too horrible. There are a few NVidia gpu models out there which
may need a bit more than 1 retry to get a successful query result
under some conditions.

Since Linux 4.4 the update code for vblank counter and timestamp
in drm_update_vblank_count() changed so that the implementation
assumes that high precision vblank timestamping of a kms driver
either consistently succeeds or consistently fails for a given
video mode and encoder/connector combo. Iow. switching from success
to fail or vice versa on a modeset or connector change is ok, but
spurious temporary failure for a given setup can confuse the core
code and potentially cause bad miscounting of vblanks and confusion
or hangs in userspace clients which rely on vblank  stuff, e.g.,
desktop compositors.

Therefore change the max retry count to a larger number - more than
any gpu so far is known to need to succeed, but still low enough
so that these queries which do also happen in vblank interrupt are
still fast enough to be not disastrously long if something would
go badly wrong with them.

As such sporadic retries only happen seldom even on affected gpu's,
this could mean a vblank irq could take a few dozen microseconds
longer every few hours of uptime -- better than a desktop compositor
randomly hanging every couple of hours or days of uptime in a hard
to reproduce manner.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-24 10:58:45 +01:00
..
accessibility
acpi ACPI / PMIC: xpower: Fix power_table addresses 2018-03-24 10:58:45 +01:00
amba
android binder: add missing binder_unlock() 2018-02-28 10:17:23 +01:00
ata ahci: Add Intel Cannon Lake PCH-H PCI ID 2018-02-16 20:09:42 +01:00
atm atm: horizon: Fix irq release error 2017-12-16 10:33:55 +01:00
auxdisplay
base drivers: base: cacheinfo: fix boot error message when acpi is enabled 2018-01-31 12:06:08 +01:00
bcma bcma: use (get|put)_device when probing/removing device driver 2017-03-12 06:37:30 +01:00
block mtip32xx: use runtime tag to initialize command header 2018-03-24 10:58:44 +01:00
bluetooth Bluetooth: btusb: Restore QCA Rome suspend/resume fix with a "rewritten" version 2018-02-16 20:09:46 +01:00
bus sunxi-rsb: Include OF based modalias in device uevent 2018-01-10 09:27:09 +01:00
cdrom
char ipmi/watchdog: fix wdog hang on panic waiting for ipmi response 2018-03-24 10:58:45 +01:00
clk clk: ns2: Correct SDIO bits 2018-03-24 10:58:41 +01:00
clocksource clockevents/drivers/cs5535: Improve resilience to spurious interrupts 2017-10-27 10:23:17 +02:00
connector
cpufreq cpufreq/sh: Replace racy task affinity logic 2018-03-24 10:58:41 +01:00
cpuidle cpuidle: fix broadcast control when broadcast can not be entered 2017-12-25 14:22:15 +01:00
crypto crypto: s5p-sss - Fix kernel Oops in AES-ECB mode 2018-02-25 11:03:55 +01:00
dca
devfreq PM / devfreq: Propagate error from devfreq_add_device() 2018-02-22 15:44:58 +01:00
dio
dma dmaengine: imx-sdma: add 1ms delay to ensure SDMA channel is stopped 2018-03-22 09:23:22 +01:00
dma-buf
edac EDAC, octeon: Fix an uninitialized variable warning 2018-02-16 20:09:47 +01:00
eisa
extcon extcon: palmas: Check the parent instance to prevent the NULL 2017-11-21 09:21:18 +01:00
firewire
firmware efi/esrt: Cleanup bad memory map log messages 2017-12-20 10:04:56 +01:00
fmc
fpga
gpio gpio: xgene: mark PM functions as __maybe_unused 2018-02-25 11:03:50 +01:00
gpu drm/nouveau/kms: Increase max retries in scanout position queries. 2018-03-24 10:58:45 +01:00
hid HID: elo: clear BTN_LEFT mapping 2018-03-22 09:23:27 +01:00
hsi HSI: ssi_protocol: double free in ssip_pn_xmit() 2018-03-24 10:58:42 +01:00
hv Drivers: hv: vmbus: fix build warning 2018-02-25 11:03:46 +01:00
hwmon driver: (adm1275) set the m,b and R coefficients correctly for power 2018-03-22 09:23:22 +01:00
hwspinlock
hwtracing coresight: Fixes coresight DT parse to get correct output port ID. 2018-03-22 09:23:25 +01:00
i2c i2c: i2c-scmi: add a MS HID 2018-03-24 10:58:41 +01:00
ide
idle idle: i7300: add PCI dependency 2018-02-25 11:03:51 +01:00
iio iio: st_pressure: st_accel: Initialise sensor platform data properly 2018-03-24 10:58:44 +01:00
infiniband infiniband/uverbs: Fix integer overflows 2018-03-24 10:58:43 +01:00
input Input: ar1021_i2c - fix too long name in driver's device table 2018-03-24 10:58:40 +01:00
iommu iommu/omap: Register driver before setting IOMMU ops 2018-03-24 10:58:42 +01:00
ipack
irqchip irqchip/gic-v3-its: Ensure nr_ites >= nr_lpis 2018-03-22 09:23:31 +01:00
isdn isdn: sc: work around type mismatch warning 2018-02-25 11:03:51 +01:00
leds Revert "led: core: Fix brightness setting when setting delay_off=0" 2018-03-11 16:19:45 +01:00
lguest
lightnvm
macintosh
mailbox mailbox: handle empty message in tx_tick 2017-08-06 19:19:41 -07:00
mcb
md md/raid10: wait up frozen array in handle_write_completed 2018-03-24 10:58:42 +01:00
media media/dvb-core: Race condition when writing to CAM 2018-03-24 10:58:41 +01:00
memory ARM: OMAP2+: gpmc-onenand: propagate error on initialization failure 2017-12-16 10:33:51 +01:00
memstick
message mptfusion: hide unused seq_mpt_print_ioc_summary function 2018-02-25 11:03:45 +01:00
mfd mfd: palmas: Reset the POWERHOLD mux during power off 2018-03-24 10:58:44 +01:00
misc scsi: ses: don't get power status of SES device slot on probe 2018-03-22 09:23:24 +01:00
mmc mmc: sdhci-of-esdhc: limit SD clock for ls1012a/ls1046a 2018-03-24 10:58:45 +01:00
mtd mtd: nand: fix interpretation of NAND_CMD_NONE in nand_command[_lp]() 2018-03-22 09:23:28 +01:00
net rndis_wlan: add return value validation 2018-03-24 10:58:44 +01:00
nfc NFC: nfcmrvl: double free on error path 2018-03-22 09:23:23 +01:00
ntb ntb_transport: fix bug calculating num_qps_mw 2017-08-30 10:19:29 +02:00
nubus
nvdimm libnvdimm, namespace: make 'resource' attribute only readable by root 2017-11-30 08:37:23 +00:00
nvme nvme: Fix managing degraded controllers 2018-02-16 20:09:47 +01:00
nvmem nvmem: imx-ocotp: Fix wrong register size 2017-08-06 19:19:46 -07:00
of of: fix of_device_get_modalias returned length when truncating buffers 2018-03-22 09:23:21 +01:00
oprofile
parisc parisc: Hide Diva-built-in serial aux and graphics card 2018-01-02 20:33:20 +01:00
parport parisc, parport_gsc: Fixes for printk continuation lines 2017-06-17 06:39:37 +02:00
pci PCI/MSI: Stop disabling MSI/MSI-X in pci_device_shutdown() 2018-03-22 09:23:19 +01:00
pcmcia
perf drivers/perf: arm_pmu: handle no platform_device 2018-03-22 09:23:26 +01:00
phy phy: work around 'phys' references to usb-nop-xceiv devices 2018-01-23 19:50:16 +01:00
pinctrl pinctrl: sunxi: Fix A80 interrupt pin bank 2018-02-25 11:03:39 +01:00
platform platform/x86: asus-nb-wmi: Add wapf4 quirk for the X302UA 2018-03-24 10:58:40 +01:00
pnp
power power: bq27xxx_battery: mark some symbols __maybe_unused 2018-02-25 11:03:50 +01:00
powercap
pps
ps3
ptp time: Change posix clocks ops interfaces to use timespec64 2018-03-24 10:58:40 +01:00
pwm pwm: tegra: Increase precision in PWM rate calculation 2018-03-22 09:23:27 +01:00
rapidio
ras
regulator regulator: anatop: set default voltage selector for pcie 2018-03-24 10:58:40 +01:00
remoteproc
reset
rpmsg
rtc rtc: cmos: Do not assume irq 8 for rtc when there are no legacy irqs 2018-03-24 10:58:40 +01:00
s390 s390/qeth: fix IPA command submission race 2018-03-11 16:19:47 +01:00
sbus
scsi scsi: mac_esp: Replace bogus memory barrier with spinlock 2018-03-24 10:58:43 +01:00
sfi
sh
sn
soc
spi spi: dw: Disable clock after unregistering the host 2018-03-24 10:58:41 +01:00
spmi spmi: Include OF based modalias in device uevent 2017-07-27 15:06:10 -07:00
ssb ssb: mark ssb_bus_register as __maybe_unused 2018-02-25 11:03:44 +01:00
staging staging: wilc1000: fix unchecked return value 2018-03-24 10:58:44 +01:00
target target/user: Fix cast from pointer to phys_addr_t 2018-02-25 11:03:46 +01:00
tc
thermal thermal: spear: use __maybe_unused for PM functions 2018-02-25 11:03:44 +01:00
thunderbolt
tty serial: 8250_pci: Add Brainboxes UC-260 4 port serial device 2018-03-18 11:17:53 +01:00
uio
usb usb: gadget: bdc: 64-bit pointer capability check 2018-03-22 09:23:32 +01:00
uwb uwb: ensure that endpoint is interrupt 2017-10-12 11:27:35 +02:00
vfio vfio-pci: Handle error from pci_iomap 2017-08-06 19:19:46 -07:00
vhost vhost_net: stop device during reset owner 2018-02-16 20:09:38 +01:00
video video/hdmi: Allow "empty" HDMI infoframes 2018-03-22 09:23:27 +01:00
virt
virtio virtio_balloon: prevent uninitialized variable use 2018-02-25 11:03:42 +01:00
vlynq
vme
w1 w1: ds2490: USB transfer buffers need to be DMAable 2017-03-12 06:37:29 +01:00
watchdog watchdog: hpwdt: fix unused variable warning 2018-03-18 11:17:50 +01:00
xen xen/gntdev: Fix partial gntdev_mmap() cleanup 2018-03-03 10:19:45 +01:00
zorro
Kconfig
Makefile usb: build drivers/usb/common/ when USB_SUPPORT is set 2018-02-25 11:03:38 +01:00